Electric kettle



FIG. 1 is a front, top and right-side perspective view of an electric kettle showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a left-side view thereof; and,

FIG. 8 is a rear, top and left-side perspective view thereof.

The broken lines depict portions of an electric kettle in which the design is embodied and form no part of the claimed design. 

CLAIM The ornamental design for an electric kettle, as shown and described. 